Index: Ringtoets/Common/src/Ringtoets.Common.IO/Writers/XmlWriterExtensions.cs
===================================================================
diff -u -r5d8bda6e12681d1c019b449b298c464921a06ed7 -rbd630045ef64f5b7e321021205aae3a4d32f4a5e
--- Ringtoets/Common/src/Ringtoets.Common.IO/Writers/XmlWriterExtensions.cs	(.../XmlWriterExtensions.cs)	(revision 5d8bda6e12681d1c019b449b298c464921a06ed7)
+++ Ringtoets/Common/src/Ringtoets.Common.IO/Writers/XmlWriterExtensions.cs	(.../XmlWriterExtensions.cs)	(revision bd630045ef64f5b7e321021205aae3a4d32f4a5e)
@@ -29,7 +29,7 @@
     public static class XmlWriterExtensions
     {
         /// <summary>
-        /// Writes a single distribution as a stochast element in file.
+        /// Writes a single <see cref="MeanStandardDeviationStochastConfiguration"/> as a stochast element in file.
         /// </summary>
         /// <param name="writer">The writer to use to write the distribution.</param>
         /// <param name="name"></param>
@@ -53,6 +53,14 @@
             writer.WriteEndElement();
         }
 
+        /// <summary>
+        /// Writes a single <see cref="MeanVariationCoefficientStochastConfiguration"/> as a stochast element in file.
+        /// </summary>
+        /// <param name="writer">The writer to use to write the distribution.</param>
+        /// <param name="name"></param>
+        /// <param name="distribution">The distribution to write.</param>
+        /// <exception cref="InvalidOperationException">Thrown when the <paramref name="writer"/> is 
+        /// in an invalid state for writing.</exception>
         public static void WriteDistribution(this XmlWriter writer, string name, MeanVariationCoefficientStochastConfiguration distribution)
         {
             writer.WriteStartElement(ConfigurationSchemaIdentifiers.StochastElement);
@@ -69,5 +77,36 @@
 
             writer.WriteEndElement();
         }
+
+        /// <summary>
+        /// Writes a single <see cref="WaveReductionConfiguration"/> as a wave reduction element in file.
+        /// </summary>
+        /// <param name="writer">The writer to use to write the wave reduction.</param>
+        /// <param name="waveReduction">The wave reduction to write.</param>
+        /// <exception cref="InvalidOperationException">Thrown when the <paramref name="writer"/> is 
+        /// in an invalid state for writing.</exception>
+        public static void WriteWaveReduction(this XmlWriter writer, WaveReductionConfiguration waveReduction)
+        {
+            writer.WriteStartElement(ConfigurationSchemaIdentifiers.WaveReduction);
+
+            if (waveReduction.UseBreakWater.HasValue)
+            {
+                writer.WriteElementString(ConfigurationSchemaIdentifiers.UseBreakWater, XmlConvert.ToString(waveReduction.UseBreakWater.Value));
+            }
+            if (waveReduction.BreakWaterType.HasValue)
+            {
+                writer.WriteElementString(ConfigurationSchemaIdentifiers.BreakWaterType, new ReadBreakWaterTypeConverter().ConvertToInvariantString(waveReduction.BreakWaterType.Value));
+            }
+            if (waveReduction.BreakWaterHeight.HasValue)
+            {
+                writer.WriteElementString(ConfigurationSchemaIdentifiers.BreakWaterHeight, XmlConvert.ToString(waveReduction.BreakWaterHeight.Value));
+            }
+            if (waveReduction.UseForeshoreProfile.HasValue)
+            {
+                writer.WriteElementString(ConfigurationSchemaIdentifiers.UseForeshore, XmlConvert.ToString(waveReduction.UseForeshoreProfile.Value));
+            }
+
+            writer.WriteEndElement();
+        }
     }
 }
\ No newline at end of file
Index: Ringtoets/Common/test/Ringtoets.Common.IO.Test/Writers/XmlWriterExtensionsTest.cs
===================================================================
diff -u -r5d8bda6e12681d1c019b449b298c464921a06ed7 -rbd630045ef64f5b7e321021205aae3a4d32f4a5e
--- Ringtoets/Common/test/Ringtoets.Common.IO.Test/Writers/XmlWriterExtensionsTest.cs	(.../XmlWriterExtensionsTest.cs)	(revision 5d8bda6e12681d1c019b449b298c464921a06ed7)
+++ Ringtoets/Common/test/Ringtoets.Common.IO.Test/Writers/XmlWriterExtensionsTest.cs	(.../XmlWriterExtensionsTest.cs)	(revision bd630045ef64f5b7e321021205aae3a4d32f4a5e)
@@ -99,12 +99,71 @@
                 .SetName("Variation coefficient distribution with mean and variation coefficient.");
         }
 
+        public static IEnumerable<TestCaseData> GetWaveReductions()
+        {
+            yield return new TestCaseData(
+                    new WaveReductionConfiguration(),
+                    "waveReductionWithoutParameters.xml")
+                .SetName("Wave reduction without any of its paramters set.");
+
+            yield return new TestCaseData(
+                    new WaveReductionConfiguration
+                    {
+                        UseBreakWater = true,
+                        BreakWaterType = ReadBreakWaterType.Dam,
+                        BreakWaterHeight = 2.33,
+                        UseForeshoreProfile = false
+                    },
+                    "waveReduction.xml")
+                .SetName("Wave reduction with all its paramters set.");
+
+            yield return new TestCaseData(
+                    new WaveReductionConfiguration
+                    {
+                        UseBreakWater = true,
+                        BreakWaterType = ReadBreakWaterType.Caisson,
+                        UseForeshoreProfile = false
+                    },
+                    "waveReductionWithoutBreakWaterHeight.xml")
+                .SetName("Wave reduction without break water height set.");
+
+            yield return new TestCaseData(
+                    new WaveReductionConfiguration
+                    {
+                        UseBreakWater = false,
+                        BreakWaterHeight = 12.66,
+                        UseForeshoreProfile = true
+                    },
+                    "waveReductionWithoutBreakWaterType.xml")
+                .SetName("Wave reduction without break water type set.");
+
+            yield return new TestCaseData(
+                    new WaveReductionConfiguration
+                    {
+                        BreakWaterType = ReadBreakWaterType.Wall,
+                        BreakWaterHeight = 23.4,
+                        UseForeshoreProfile = false
+                    },
+                    "waveReductionWithoutUseBreakWater.xml")
+                .SetName("Wave reduction without use break water set.");
+
+            yield return new TestCaseData(
+                    new WaveReductionConfiguration
+                    {
+                        UseBreakWater = true,
+                        BreakWaterType = ReadBreakWaterType.Dam,
+                        BreakWaterHeight = 0.2,
+                    },
+                    "waveReductionWithoutUseForeshoreProfile.xml")
+                .SetName("Wave reduction without use foreshore profile set.");
+        }
+
         [Test]
         [TestCaseSource(nameof(GetDistributions))]
-        public void WriteDistribution_WithoutDifferentSetParameters_WritesStochastWithSetParameters(MeanStandardDeviationStochastConfiguration distribution, string fileName)
+        public void WriteDistribution_WithDifferentSetParameters_WritesStochastWithSetParameters(MeanStandardDeviationStochastConfiguration distribution, string fileName)
         {
             // Setup
-            string filePath = TestHelper.GetScratchPadPath(nameof(WriteDistribution_WithoutDifferentSetParameters_WritesStochastWithSetParameters));
+            string filePath = TestHelper.GetScratchPadPath(nameof(WriteDistribution_WithDifferentSetParameters_WritesStochastWithSetParameters));
             const string name = "normal";
 
             try
@@ -128,10 +187,10 @@
 
         [Test]
         [TestCaseSource(nameof(GetVariationCoefficientDistributions))]
-        public void WriteDistribution_WithoutDifferentSetParameters_WritesStochastWithSetParameters(MeanVariationCoefficientStochastConfiguration distribution, string fileName)
+        public void WriteDistribution_WithDifferentSetParameters_WritesStochastWithSetParameters(MeanVariationCoefficientStochastConfiguration distribution, string fileName)
         {
             // Setup
-            string filePath = TestHelper.GetScratchPadPath(nameof(WriteDistribution_WithoutDifferentSetParameters_WritesStochastWithSetParameters));
+            string filePath = TestHelper.GetScratchPadPath(nameof(WriteDistribution_WithDifferentSetParameters_WritesStochastWithSetParameters));
             const string name = "variation coefficient normal";
 
             try
@@ -153,6 +212,32 @@
             }
         }
 
+        [Test]
+        [TestCaseSource(nameof(GetWaveReductions))]
+        public void WriteWaveReduction_WithoutDifferentSetParameters_WritesStochastWithSetParameters(WaveReductionConfiguration waveReduction, string fileName)
+        {
+            // Setup
+            string filePath = TestHelper.GetScratchPadPath(nameof(WriteWaveReduction_WithoutDifferentSetParameters_WritesStochastWithSetParameters));
+
+            try
+            {
+                using (XmlWriter xmlWriter = CreateXmlWriter(filePath))
+                {
+                    // Call
+                    xmlWriter.WriteWaveReduction(waveReduction);
+                }
+
+                // Assert
+                string actualXml = File.ReadAllText(filePath);
+                string expectedXml = GetTestFileContent(fileName);
+                Assert.AreEqual(expectedXml, actualXml);
+            }
+            finally
+            {
+                File.Delete(filePath);
+            }
+        }
+
         private string GetTestFileContent(string testFile)
         {
             return File.ReadAllText(Path.Combine(testDirectory, testFile));
Index: Ringtoets/Common/test/Ringtoets.Common.IO.Test/test-data/CalculationConfigurationWriter/waveReduction.xml
===================================================================
diff -u
--- Ringtoets/Common/test/Ringtoets.Common.IO.Test/test-data/CalculationConfigurationWriter/waveReduction.xml	(revision 0)
+++ Ringtoets/Common/test/Ringtoets.Common.IO.Test/test-data/CalculationConfigurationWriter/waveReduction.xml	(revision bd630045ef64f5b7e321021205aae3a4d32f4a5e)
@@ -0,0 +1,6 @@
+<golfreductie>
+  <damgebruiken>true</damgebruiken>
+  <damtype>havendam</damtype>
+  <damhoogte>2.33</damhoogte>
+  <voorlandgebruiken>false</voorlandgebruiken>
+</golfreductie>
\ No newline at end of file
Index: Ringtoets/Common/test/Ringtoets.Common.IO.Test/test-data/CalculationConfigurationWriter/waveReductionWithoutBreakWaterHeight.xml
===================================================================
diff -u
--- Ringtoets/Common/test/Ringtoets.Common.IO.Test/test-data/CalculationConfigurationWriter/waveReductionWithoutBreakWaterHeight.xml	(revision 0)
+++ Ringtoets/Common/test/Ringtoets.Common.IO.Test/test-data/CalculationConfigurationWriter/waveReductionWithoutBreakWaterHeight.xml	(revision bd630045ef64f5b7e321021205aae3a4d32f4a5e)
@@ -0,0 +1,5 @@
+<golfreductie>
+  <damgebruiken>true</damgebruiken>
+  <damtype>caisson</damtype>
+  <voorlandgebruiken>false</voorlandgebruiken>
+</golfreductie>
\ No newline at end of file
Index: Ringtoets/Common/test/Ringtoets.Common.IO.Test/test-data/CalculationConfigurationWriter/waveReductionWithoutBreakWaterType.xml
===================================================================
diff -u
--- Ringtoets/Common/test/Ringtoets.Common.IO.Test/test-data/CalculationConfigurationWriter/waveReductionWithoutBreakWaterType.xml	(revision 0)
+++ Ringtoets/Common/test/Ringtoets.Common.IO.Test/test-data/CalculationConfigurationWriter/waveReductionWithoutBreakWaterType.xml	(revision bd630045ef64f5b7e321021205aae3a4d32f4a5e)
@@ -0,0 +1,5 @@
+<golfreductie>
+  <damgebruiken>false</damgebruiken>
+  <damhoogte>12.66</damhoogte>
+  <voorlandgebruiken>true</voorlandgebruiken>
+</golfreductie>
\ No newline at end of file
Index: Ringtoets/Common/test/Ringtoets.Common.IO.Test/test-data/CalculationConfigurationWriter/waveReductionWithoutParameters.xml
===================================================================
diff -u
--- Ringtoets/Common/test/Ringtoets.Common.IO.Test/test-data/CalculationConfigurationWriter/waveReductionWithoutParameters.xml	(revision 0)
+++ Ringtoets/Common/test/Ringtoets.Common.IO.Test/test-data/CalculationConfigurationWriter/waveReductionWithoutParameters.xml	(revision bd630045ef64f5b7e321021205aae3a4d32f4a5e)
@@ -0,0 +1 @@
+<golfreductie />
\ No newline at end of file
Index: Ringtoets/Common/test/Ringtoets.Common.IO.Test/test-data/CalculationConfigurationWriter/waveReductionWithoutUseBreakWater.xml
===================================================================
diff -u
--- Ringtoets/Common/test/Ringtoets.Common.IO.Test/test-data/CalculationConfigurationWriter/waveReductionWithoutUseBreakWater.xml	(revision 0)
+++ Ringtoets/Common/test/Ringtoets.Common.IO.Test/test-data/CalculationConfigurationWriter/waveReductionWithoutUseBreakWater.xml	(revision bd630045ef64f5b7e321021205aae3a4d32f4a5e)
@@ -0,0 +1,5 @@
+<golfreductie>
+  <damtype>verticalewand</damtype>
+  <damhoogte>23.4</damhoogte>
+  <voorlandgebruiken>false</voorlandgebruiken>
+</golfreductie>
\ No newline at end of file
Index: Ringtoets/Common/test/Ringtoets.Common.IO.Test/test-data/CalculationConfigurationWriter/waveReductionWithoutUseForeshoreProfile.xml
===================================================================
diff -u
--- Ringtoets/Common/test/Ringtoets.Common.IO.Test/test-data/CalculationConfigurationWriter/waveReductionWithoutUseForeshoreProfile.xml	(revision 0)
+++ Ringtoets/Common/test/Ringtoets.Common.IO.Test/test-data/CalculationConfigurationWriter/waveReductionWithoutUseForeshoreProfile.xml	(revision bd630045ef64f5b7e321021205aae3a4d32f4a5e)
@@ -0,0 +1,5 @@
+<golfreductie>
+  <damgebruiken>true</damgebruiken>
+  <damtype>havendam</damtype>
+  <damhoogte>0.2</damhoogte>
+</golfreductie>
\ No newline at end of file